Mild Start to November Breaks Temperature Records in the UK
The beginning of November 2025 saw a remarkable series of new high daily minimum temperature records across the UK, with many weather stations reporting notable warmth. This exceptional period of overnight heat follows an October that was already warmer than average and reveals the changing meteorological conditions behind these new records.
October 2025 Set the Stage
October 2025 had a mean temperature provisionally 0.7°C above the 1991–2020 average. Scotland and Northern Ireland experienced slightly warmer conditions compared to the rest of the UK, priming the country for the warm November start.
Warm Air Flow and Cloudy Skies
As November began, a flow of warm air from the south moved across the UK. This southerly pattern, combined with cloudy skies, helped trap warmth overnight, resulting in unusually high daily minimum temperatures.
Explanation of Daily Minimum Temperature
The daily minimum temperature is the lowest temperature observed during a 24-hour period between 0900 UTC on one day and 0900 UTC the next. The date assigned to this value is the end date because the lowest temperatures typically occur in the early morning hours.
Record-Breaking Bonfire Night 2025
"Temperatures overnight only dropped to 14.4℃ at Teddington in London, provisionally making it the mildest Bonfire Night on record."
The previous record for the night of November 5th–6th was 13.9℃ at Gordon Castle, Scotland, set in 1938.
The combination of warm southerly air and cloud cover led to an unprecedented mild night during a traditionally cool event.
Summary
November 2025’s mild start, driven by warm airflow and cloud cover, caused multiple UK locations to break daily minimum temperature records, including the warmest Bonfire Night on record.
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